Question: What was the {national anthem} of {Ottoman Empire}?
Paraphrase: What was the {national song of devotion} of {Hassock Empire}?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q12560 wdt:P85 ?obj . ?obj wdt:P31 wd:Q23691 } 
Answer: Imperial anthems of the Ottoman Empire